package com.java_project.src;
import java.io.Serializable;
import java.util.HashSet;
import java.util.Objects;
import java.util.Set;
//public class Product implements Comparable<Product>{
public class Product implements Serializable, Comparable<Product>{
    //添加序列化版本号
    private static  final long serialVersionUID = 1L;

    private String id;      // 商品ID
    private String name;    // 商品名称
    private double price;   // 价格
    private int stock;// 库存
    private Set<String> tags;

    public Product(String id, String name, double price, int stock, Set<String> tags) {
        this.id = id;
        this.name = name;
        this.price = price;
        this.stock = stock;
        this.tags=(tags !=null)?new HashSet<>(tags):new HashSet<>();
    }

    // Getters and Setters ...
    public String getId() { return id; }
    public void setId(String id) { this.id = id; }
    public String getName() { return name; }
    public void setName(String name) { this.name = name; }
    public double getPrice() { return price; }
    public void setPrice(double price) { this.price = price; }
    public int getStock() { return stock; }
    public void setStock(int stock) { this.stock = stock; }
    public Set<String> getTags() { return new HashSet<>(tags); }
    public void setTags(Set<String> tags) { this.tags = new HashSet<>(tags); }
    @Override
    public String toString() {
        String tagStr = tags.isEmpty() ? "无" : tags.toString();
        return String.format("ID: %-5s | 名称: %-20s | 价格: ¥%-8.2f | 库存: %d | 标签：%s" , id, name, price, stock,tagStr);
    }
    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Product product = (Product) o;
        return Objects.equals(id, product.id);
    }

    @Override
    public int hashCode() {

        return Objects.hash(id);
    }
    @Override
   public int compareTo(Product other) {
       return this.id.compareTo(other.id);
    }
}
